Hair dryer

ABSTRACT

A hair dryer comprises a main channel seat; an assembly seat being installed at a center axis of the main chamber; an outer side of the inner stator being enclosed by a rotatable outer rotor of a brushless motor; an outer wall of the outer rotor being integrally formed with a plurality of blades; an inner wall of the outer rotor being installed with magnets which is interactable with coils of the inner stator; a plurality of flow guides being integrally formed between an outer wall of the assembly seat and an inner wall of the main channel seat. Furthermore, an interior of the assembly seat is formed with a circuit installing chamber and a stator installing chamber behind the circuit installing chamber. A wind inlet is arranged behind and is buckled to the main chamber. A heat-isolation heating chamber is installed at a rear side of the main chamber.

FIELD THE INVENTION

The present invention relates to hair dryers, and in particular to a hair dryer suitable for brushless motors and having a concrete structure.

BACKGROUND OF THE INVENTION

In the prior art hair dryer, a motor is used to drive blades so that air is sucked from a wind inlet. Then the wind is heated electrically and then is blown out. In the prior art hair dryer structure, all parts are formed individually and then the assembly work is tedious and time consumed so that the assembly cost is high and efficiency is low, and thus it is uneconomic.

Meanwhile, in the prior art structure, the motors of hair dryers has brushes which are worn easily in operation so as to reduce the lifetime. When the operation is over the setting time period (for example, 500 hours for DC motor, 1000-2000 hours for AC motor), the carbon brush will wear and thus cannot work so that it is needed to repair or updated. Therefore, brushless motors are used to replace the prior brush motors so as to prolong the lifetime of the hair dryer (for example prolonged to 500 to 2000 hours). However, conventional hair dryer structure is confined so that air cannot flow directly along a straight line without wind resistance, as a result the noise generates. Therefore, there is an eager demand for a novel structure which can integrate parts of the hair dryers so as to reduce the cost in assembly and reduce the noise in operation.

SUMMARY OF THE INVENTION

To resolve the above mentioned defects, the present invention provides a hair dryer, in that a brushless DC motor is installed within the main channel seat without the problem of wearing of carbon brush and shortening of lifetime. A plurality of flow guides are integrally formed between an outer wall of the assembly seat and an inner wall of the main channel seat so that the structure is concrete. Air flows into the wind inlet from a rear side and then is sucked thereinto by the outer rotor of the motor. The flow passes through the wind guides along a straight path, then flow into the heat-isolation heating chamber and then flows out of a wind outlet. As a result, since the path from the wind inlet to wind outlet is direct, wind resistance is small and noise is low. The main channel seat is integrally formed and is buckled to the wind inlet directly, as well as the main channel seat is connected to the heat-isolation heating chamber at a front side thereof. The structure can be assembled easily and quickly so as to reduce the cost and time required in assembly.

To achieve above object, the present invention provides a hair dryer comprises a main channel seat having an inner chamber; an assembly seat being installed at a center axis of the main chamber; an outer side of the inner stator being enclosed by a rotatable outer rotor of a brushless motor; an outer wall of the outer rotor being integrally formed with a plurality of blades; an inner wall of the outer rotor being installed with magnets which is interactable with coils of the inner stator; a plurality of flow guides being integrally formed between an outer wall of the assembly seat and an inner wall of the main channel seat.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the embodiment of the present invention.

FIG. 2 is a cross sectional view about the embodiment of the present invention.

FIG. 3 shows the assembly view of the main channel seat of the present invention.

FIG. 4 is a left side view of the present invention.

FIG. 5 is a right side view of the present invention.

FIG. 6 is an assembled cross sectional view about the main channel seat of the present invention.

FIG. 7 is a left side view of the main channel seat of the present invention.

FIG. 8 is a right side view of the main channel seat of the present invention.

FIG. 9 is a cross sectional view along line A-A of the present invention.

FIG. 10 shows the outer rotor of the present invention.

FIG. 11 is a left side view of the present invention.

FIG. 12 is a right side view of the present invention.

DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.

With reference to FIGS. 1 and 2, the hair dryer structure of the present invention is illustrated. The hair dryer includes the following elements.

A main channel seat 1 has an inner chamber; referring to FIGS. 3 to 6 and 7 to 11, an assembly seat 11 is installed at a center axis of the main chamber 1. An interior of the assembly seat 11 is formed with a circuit installing chamber 111 and a stator installing chamber 112 behind the circuit installing chamber 111 for installing an inner stator 4 of a brushless motor and a power supply circuit set (not shown). An outer side of the inner stator 4 is enclosed by a rotatable outer rotor 5 (as illustrated in FIGS. 10 to 12) An outer wall of the outer rotor 5 is integrally formed with a plurality of blades 51. An inner wall of the outer rotor 5 is installed with magnets which is interactable with coils of the inner stator 4. A plurality of flow guides are integrally formed between an outer wall of the assembly seat 11 and an inner wall of the main channel seat 1.

A wind inlet 2 is arranged behind and is buckled to the main chamber 1,

A heat-isolation heating chamber 3 installed at a rear side of the main chamber 1.

Advantages of the present invention will be described herein. In the present invention, a brushless DC motor is installed within the main channel seat without the problem of wearing of carbon brush and shortening of lifetime. A plurality of flow guides are integrally formed between an outer wall of the assembly seat and an inner wall of the main channel seat so that the structure is concrete. Air flows into the wind inlet from a rear side and then is sucked thereinto by the outer rotor of the motor. The flow passes through the wind guides along a straight path, then flow into the heat-isolation heating chamber and then flows out of a wind outlet. As a result, since the path from the wind inlet to wind outlet is direct, wind resistance is small and noise is low. The main channel seat is integrally formed and is buckled to the wind inlet directly, as well as the main channel seat is connected to the heat-isolation heating chamber at a front side thereof. The structure can be assembled easily and quickly so as to reduce the cost and time required in assembly.

The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. 

What is claimed is:
 1. A hair dryer, comprising: a main channel seat having an inner chamber; an assembly seat being installed at a center axis of the main chamber; an outer side of the inner stator being enclosed by a rotatable outer rotor of a brushless motor; an outer wall of the outer rotor being integrally formed with a plurality of blades; an inner wall of the outer rotor being installed with magnets which is interactable with coils of the inner stator; a plurality of flow guides being integrally formed between an outer wall of the assembly seat and an inner wall of the main channel seat.
 2. The hair dryer as claimed in claim 1, wherein an interior of the assembly seat is formed with a circuit installing chamber and a stator installing chamber behind the circuit installing chamber for installing an inner stator of the brushless motor and a power supply circuit set.
 3. The hair dryer as claimed in claim 1, wherein a wind inlet is arranged behind and is buckled to the main chamber,
 4. The hair dryer as claimed in claim 1, wherein a heat-isolation heating chamber is installed at a rear side of the main chamber. 